<template>
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="../../../assets/img/common/back.svg" alt="">
      </div>
      <div slot="center" class="title">
        <div v-for="(item,index) in titles" :key="item" 
              class="title-item" :class="{active: index === currentIndex}"
              @click="titleClick(index)">
          {{item}}
        </div>
      </div>
    </nav-bar>

  </div>
</template>

<script>
  import NavBar from "../../../components/common/navbar/NavBar.vue";

  export default {
    name: 'DetailNavBar',
    components: {
      NavBar,
    },
    data() {
      return {
        titles: ['商品','参数','评论','推荐'],
        currentIndex: 0,
      }
    },
    methods: {
      titleClick(index) {
        this.currentIndex = index;
        this.$emit('titleClick',index)
      },
      backClick() {

        // this.$router.go(-1)
        this.$router.back()
      }
    }
  }
</script>

<style scoped>
.title {
  display: flex;
}

.title-item {
  flex: 1;
}

.active {
  color: var(--color-high-text);
}

.back img{  
  margin-top: 10px;
  margin-right: 20px;

}
</style>